/*
moxl - Modular XML Library
Copyright (c) 2007, Malcolm Sparks

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package moxl.xpath.parser.operators;

import moxl.xpath.XPathContext;
import moxl.xpath.parser.AbstractOperator;
import moxl.xpath.parser.types.XPathBooleanValue;
import moxl.xpath.parser.types.XPathNumberValue;
import moxl.xpath.parser.types.AbstractXPathValue;

public class LessThanOrEqualToOperator extends AbstractOperator
{

	public LessThanOrEqualToOperator(int precedence)
	{
		super("<=", precedence);
	}

	@Override
	public AbstractXPathValue evaluate(XPathContext ctx, AbstractXPathValue val1, AbstractXPathValue val2)
	{
		if (val1 instanceof XPathNumberValue && val2 instanceof XPathNumberValue)
		{
			boolean result = ((XPathNumberValue) val1).getValueAsDouble() <= ((XPathNumberValue) val2).getValueAsDouble();
			return result ? XPathBooleanValue.TRUE : XPathBooleanValue.FALSE;
		}
		else
		{
			return XPathBooleanValue.FALSE;
		}
	}

}
